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+IF-INVERTED-STACK-MIB DEFINITIONS ::= BEGIN
+
+IMPORTS
+ MODULE-IDENTITY, OBJECT-TYPE, mib-2 FROM SNMPv2-SMI
+ RowStatus FROM SNMPv2-TC
+ MODULE-COMPLIANCE, OBJECT-GROUP FROM SNMPv2-CONF
+ ifStackGroup2,
+ ifStackHigherLayer, ifStackLowerLayer FROM IF-MIB;
+
+ifInvertedStackMIB MODULE-IDENTITY
+ LAST-UPDATED "200006140000Z"
+ ORGANIZATION "IETF Interfaces MIB Working Group"
+ CONTACT-INFO
+ " Keith McCloghrie
+ Cisco Systems, Inc.
+ 170 West Tasman Drive
+ San Jose, CA 95134-1706
+ US
+
+ 408-526-5260
+ kzm@cisco.com"
+ DESCRIPTION
+ "The MIB module which provides the Inverted Stack Table for
+ interface sub-layers."
+ REVISION "200006140000Z"
+ DESCRIPTION
+ "Initial revision, published as RFC 2864"
+ ::= { mib-2 77 }
+
+ifInvMIBObjects OBJECT IDENTIFIER ::= { ifInvertedStackMIB 1 }
+
+--
+-- The Inverted Interface Stack Group
+--
+
+ifInvStackTable OBJECT-TYPE
+ SYNTAX SEQUENCE OF IfInvStackEntry
+ MAX-ACCESS not-accessible
+ STATUS current
+ DESCRIPTION
+ "A table containing information on the relationships between
+
+ the multiple sub-layers of network interfaces. In
+ particular, it contains information on which sub-layers run
+ 'underneath' which other sub-layers, where each sub-layer
+ corresponds to a conceptual row in the ifTable. For
+ example, when the sub-layer with ifIndex value x runs
+ underneath the sub-layer with ifIndex value y, then this
+ table contains:
+
+ ifInvStackStatus.x.y=active
+
+ For each ifIndex value, z, which identifies an active
+ interface, there are always at least two instantiated rows
+ in this table associated with z. For one of these rows, z
+ is the value of ifStackHigherLayer; for the other, z is the
+ value of ifStackLowerLayer. (If z is not involved in
+ multiplexing, then these are the only two rows associated
+ with z.)
+
+ For example, two rows exist even for an interface which has
+ no others stacked on top or below it:
+
+ ifInvStackStatus.z.0=active
+ ifInvStackStatus.0.z=active
+
+ This table contains exactly the same number of rows as the
+ ifStackTable, but the rows appear in a different order."
+ REFERENCE
+ "ifStackTable of RFC 2863"
+ ::= { ifInvMIBObjects 1 }
+
+ifInvStackEntry OBJECT-TYPE
+ SYNTAX IfInvStackEntry
+ MAX-ACCESS not-accessible
+ STATUS current
+ DESCRIPTION
+ "Information on a particular relationship between two sub-
+ layers, specifying that one sub-layer runs underneath the
+ other sub-layer. Each sub-layer corresponds to a conceptual
+ row in the ifTable."
+ INDEX { ifStackLowerLayer, ifStackHigherLayer }
+ ::= { ifInvStackTable 1 }
+
+IfInvStackEntry ::=
+ SEQUENCE {
+ ifInvStackStatus RowStatus
+ }
+
+ifInvStackStatus OBJECT-TYPE
+ SYNTAX RowStatus
+ MAX-ACCESS read-only
+ STATUS current
+ DESCRIPTION
+ "The status of the relationship between two sub-layers.
+
+ An instance of this object exists for each instance of the
+ ifStackStatus object, and vice versa. For example, if the
+ variable ifStackStatus.H.L exists, then the variable
+ ifInvStackStatus.L.H must also exist, and vice versa. In
+ addition, the two variables always have the same value.
+
+ However, unlike ifStackStatus, the ifInvStackStatus object
+ is NOT write-able. A network management application wishing
+ to change a relationship between sub-layers H and L cannot
+ do so by modifying the value of ifInvStackStatus.L.H, but
+ must instead modify the value of ifStackStatus.H.L. After
+ the ifStackTable is modified, the change will be reflected
+ in this table."
+ ::= { ifInvStackEntry 1 }
+
+-- conformance information
+
+ifInvConformance OBJECT IDENTIFIER ::= { ifInvMIBObjects 2 }
+
+ifInvGroups OBJECT IDENTIFIER ::= { ifInvConformance 1 }
+ifInvCompliances OBJECT IDENTIFIER ::= { ifInvConformance 2 }
+
+-- compliance statements
+
+ifInvCompliance MODULE-COMPLIANCE
+ STATUS current
+ DESCRIPTION
+ "The compliance statement for SNMP entities which provide
+ inverted information on the layering of network interfaces."
+
+ MODULE -- this module
+ MANDATORY-GROUPS { ifInvStackGroup }
+
+ OBJECT ifInvStackStatus
+ SYNTAX INTEGER { active(1) }
+ DESCRIPTION
+ "Support is only required for 'active'."
+
+ MODULE IF-MIB
+ MANDATORY-GROUPS { ifStackGroup2 }
+ ::= { ifInvCompliances 1 }
+
+-- units of conformance
+
+ifInvStackGroup OBJECT-GROUP
+ OBJECTS { ifInvStackStatus }
+ STATUS current
+ DESCRIPTION
+ "A collection of objects providing inverted information on
+ the layering of MIB-II interfaces."
+ ::= { ifInvGroups 1 }
+
+END